Definition:Tetromino

Definition

A tetromino is a $4$-omino:

That is, it is a polyomino consisting of exactly $4$ unit squares.

Linguistic Note

The word tetromino is a back-formation from the word domino.

The prefix tetr- comes from ancient Greek meaning $4$, while -omino suffix derives from the term polyomino, which is derived in turn from domino.

Sources

• Weisstein, Eric W. "Tetromino." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/Tetromino.html